Cup hook



FIG. 1 is a front perspective view of a cup hook showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof; and,

FIG. 9 is a front view thereof, shown in an open position.

The broken lines shown in the figures depict portions of the cup hook that form no part of the claimed design. 

CLAIM The ornamental design for a cup hook, as shown and described. 